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Magnox Decommissioning Opitmisation Programme (MODP)Overview

Removal of Berkeley Boilers

Paul Oswald (Magnox), Rachel O’Donnell (LLWR), Joe Robinson (Studsvik)

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Background

• Each reactor had 8 boilers (heat exchangers) housed externally to the reactor buildings

• Boilers de-lagged and disconnected during decommissioning preps

• Currently stored horizontally around each reactor (15 in total)

• One boiler sized reduced on site in the 1990’s

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Background

• Each boiler is 21 meters long and 5 meters in diameter

• Each weighs approx. 310 tonnes

• 15 boilers originally planned to be left in situ until final site clearance 2074

• Very low levels of internal contamination present

• Initiated graduate project to investigate options

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Why now?

• Business case aligns with overall national Low Level Waste (LLW) strategy (published Summer 2010)

• For LLW metals - BPEO is to treat/recycle

• Early solutions found now, rather than at final site clearance

• Provides base load for supply chain

• Noticeable change to the site skyline

• Remains LLW if stored to final site clearance on site, so why not do it now!

Graduate Project

• Graduate Project – to under take initial ground work

• Five work streams with mentors

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Transport

Business Case

Characterisation and historical data

Size Reduction

Waste

Project initiation and definition

• Graduate Project – background work

• Transportation feasibility studies completed (Studsvik & Energy Solutions)

• Business case completed

• Additional funding secured for Berkeley Site

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Project initiation and definition

• Early collaboration with LLWR

• Optioneering undertaken to determine Best Available Technique (BAT)

• LLWR framework used to engage supply chain

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Programme

• Contract award: 4th November 2011• Inaugural meeting: 16th November 2011• Highways Agency – Special

Movement Order approval: 12th January 2012• TFS Approval: 19th January 2012• Readiness review: 28th February 2012• Lift 1st boiler: 1st March 2012• Transport 1st boiler: 23rd March 2012• Transport 5th boiler: 29th March 2012

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Commercial – utilising LLWR Waste Services Contract

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Magnox

Metal Waste Services Framework

EnergySolutions Nuvia Studsvik

Waste Services Contract

LLWR

Project relationships

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COSTAIN

Magnox

OceaneeringAssystemALE

LLWR

Studsvik

Role: Heavy-lift and transport contractor

Role: Non-Destructive Examination

Role: Boiler preparations and on-site civil enabling works

Role: Engineering substantiation

Scope of works for Lot 1 - Five boilers

• Stakeholder Engagement• Regulatory approvals• Enabling Works

– Engineering– Substantiation– Site Preparation

• Lifting & Site Transport• Off site Transport• Treatment• Secondary Waste

– LLW – LLWR– C14 – Magnox Ltd.– Recycled steel – Swedish market

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Enabling works

•Trans-frontier shipment application – approved

•Special order – granted

•Substantiation

•Integral tasks that must be completed before lifting can commence

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Stakeholder Engagement• Early introduction to SSG• Early liaison with E.A. Site Inspector• Presentation to SSG giving detail following transport feasibility study• Attendance at various public events in and around Berkeley (Berkeley

Christmas Fair, Business Forum breakfast)• Continuing liaison with E.A. – close involvement in the development of

the BAT• Regular presentations giving updates for Site personnel• Fortnightly project update to key stakeholders across Magnox Ltd• Presentation to SSG by the supply chain• Planned flyer drops giving detail of dates and times for vehicle

movements• Key stakeholder event recognising the first Boiler being removed from

site

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Lifting and site transport

• Jacking and skidding• Self propelled modular

transport (SPMT)

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Transport to Sharpness Docks

• Route survey undertaken as part of the transport study.

• Telephone cables

• Utilities

• Street furniture

• Bridges/culverts

• Tree trimming

• Road closures

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Shipping operations

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Deep sea Harbour

Storage and processing area

Studsvik Nuclear Site

Temporary Storage

Processing

Secondary Waste

Weight: ~ 310 tonnesVolume: ~ 600 m³

Processing

• Size reduction• Recovery of loose material• Decontamination of internal surfaces• Smelting• Casting of ingots for free release

– Melting of metal ensures robust characterisation analysis

– Representative sample “pucks”

– Metal is restricted release

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Secondary Waste Management

• Volume reduced waste consists of a concentrate including the radioactive nuclides to be returned

• All secondary waste packages are analysed for radiological content

• A comprehensive final report is generated during processing with radiological analysis data

• Use of standard packages for return of secondary waste

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Where we are currently

• Phase 1 site operations and transport

successfully completed

• 5 Boilers in Sweden

• Size Reduction underway on first boiler

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Film

The film may be viewed on the Mediasite

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Conclusions

• Cross SLC’s working in partnership to deliver decommissioning solutions

• Early and open engagement with supply chain to identify possible solutions

• Effective team work from all players: Magnox, LLWR and Studsvik – focused on delivery

• Clear demonstration of decommissioning in progress at Berkeley

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Questions